Pulley



Patented May 10, 1927.

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FEDERAL 'MANUFACTURING COIVIPAlb?,` OF` HQLLAND, LMI(JHIGHLN,l A `CORJEYORATION PULLEY.

i Application led September 20,1926'. "Sei'ia1"No.l36,492.

"This invention relates to a pulley which, `preferably, is made entirely of sheet metall It is a yj nimary object and purpose ofthe present invention to construct a pulley in .an exceptionally simple and economical manner and to make thesarne so that it will be durable and eliicient in service. A pri- `mary feature of` the invention resides in the manner in which the pulley is mounted in its housing, the construction Vtherefor being one that is particularly practical, serviceable and durable rin service, pulleys of this characten` being extensively used in furnace installations for carrying the chains which are used to regulate the check and draft dampers or doors of furnaces.

For an understanding of the invention and the construction embodying the same, reference may be had to the following description taken in connection with the accompanying drawing, in which,

`Fig. 1 is a perspective view of the cornplete pulley.

Fig. 2 is a perspective view of the housing therefor before the pulley itself is connected therewith.

Fig. 3 is a perspective view of the sheet metal pulley.

Fig. 4 is a perspective view of a sheet metal journal upon which the pulley is mounted and which is used not only to mount the pulley but to connect the sides of the housing.

Fig. 5 is an enlarged horizontal section through the pulley at the point of rotatable .mount thereof.

Fig. 6 is a vertical section at the same point, and

Fig. 7 is a fragmentary enlarged perspective view of one side of the pulley housing.

Like reference characters refer to like parts in the different figures of the drawing.

The pulley is made from sheet metal and includes a circular web 1 which is out- 5 wardly dished toward its center and at its outer edges is formed into a curved flange 2 so that when two of the parts are placed together back by back the flanges 2 provide a continuous groove around the pulley. At the center of each of the webs 1 an opening is made through which a cylindrical sleeve 3 of sheet metal is passed, its ends being turned outwardly to make ianges 4 whereby the two halves of the pulley are securely bound and held together.

The pulley housing is of sheetmetalbeing formed Vfrom singley plate of sheet n'letal andhaving two parallel sides 5 which are `connected 4at their upper 4ends by a cross connecting` integral piece 6 from ywhich a loop A"Wis pressed upward, Vas shown. Through `this loop theieye of ascrew-eye '8 may `be passed, the threaded shank' of f the screw being adapted to be screwed into anysuitable support for the pulley.

Thelpulley itselffwhich has been described, islocated between the'sides 5 of thehousing. `In each-ofthesi'des 5 a ycircular outwardly extending embossing -9is Emade at diametrically opposed points in which openings are cut. A journal 11 formed from a single piece of sheet metal is rolled into cylindrical form, as shown in Fig. 4, and at each end has two diametrically opposed tangs 12 which extendl in the direction of the length of the journal. This cylindrical journal ll passes through the sleeve 3 and at its ends seats in the circular grooves at the inner sides of the sides of the housing made by the embossings 9, while the tangs 12 pass through the openings 10 and are then bent inwardly toward each other so as to permanently secure the parts together. j

The pulley thus made is of very simple construction. The sleeve 3 turns readily'on the journal 11 and there is no possibility of any .binding which would interfere with the free rotation of the pulley. The construction is a very practical. one, all parts being made very expeditiously from sheet metal on a punch press and the assembly being very quick and easy. The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope.

We claim: 1. In combination with a pulley housin having spaced apart sides, of a pulley having a central opening therethrough, and a cylindrical journalihaving tangs extending from each end thereof passing through the opening in the pulley, the ends of the ournal bearing against the inner sides of the sides of the housing and said tangs passing through the sides of the housing and bent against the outer sides of said sides of the housing.

2. In combinationwith a pulley housing having spaced apart sides, each being formed with a circular embossing therein pressed outwardly so as to provide a circular groove at the inner side of each side of the housing, a pulley located between the sides of the housing having a central opening therethrough, and a hollow cylindrical journal provided with tangs projecting at each end thereof passing through the opening in the pulley and having its ends seated in said circular grooves, said tangs passing through the sides of the housing and being clenched against the outer sides thereof.

3. ln combination with a pulley housing having spaced apart sides and an upper connecting portion integrally made from a single piece of sheet inetal, of a sheet metal pulley disposed between the sides of the housing having a central opening therethrough, a hollow cylindrical journal of sheet inetal passing through said opening in the pulley and provided with tangs at its ends which pass through the sides of the housing` and are clenched against the outer sides thereof.

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4. In combination with a pulley housing having spaced apart parallel sides, each being provided with an outwardly extending circular embossing whereby circular grooves are inade at the inner sides of the sides of the housing, each of said einbossings having a plurality of openings therethrough7 of a pnl. ley comprising two parts placed back to back, each having a central opening there through and a hollow sleeve passing' through said openings and having ineans at its ends for binding the parts of the pulley and the sleeve together, and a hollow cylindrical journal equipped with a plurality of tangs at each end passing through said sleeve and at its ends seating in the grooves of said einbossings, said tangs pass ing 'through the openings inade through said embossings and clenched against the sides of the housing.

In testimony whereof )ve afiix our signatures.

THOMAS OLINGER. FRED G. BRENDEL. 

